TL;DR

Claude Sonnet 5.5 by Anthropic scores 82.24 overall, costs $2.00 per 1M input tokens and $10.00 per 1M output tokens, and carries a context window of 1M tokens — observed 2026-10-23.

Claude Sonnet 5.5

Anthropic · Proprietary · rank 6 · bench-align-v5

Compare this model Model a workload

Canonical idclaude-sonnet-5-5

Overall score82.24

Context window1M tokens

Release date2026-09-28

Access typeProprietary

Blended $/1M$4.0075% input / 25% output

Capability shape

Seven axes from the ranking source. A missing axis is drawn as a gap.

Capability evidence

Agentic78.8

Coding87.5

Knowledge83.4

Reasoning81.8

Multimodal & Grounded86.7

Instruction FollowingUnavailable

Runtime service evidence

Measured values with the date they were observed. Nothing is inferred from a sibling model or a provider claim.

Time to first token: latency to the first answer chunk (Artificial Analysis, via BenchLM). Reasoning models include thinking time, so values can run to tens or hundreds of seconds.

Evidence key: Observed

Runtime measurements
Measurement	Value	Observed	Last good	Evidence
Time to first token	394.99 s	2026-10-23	2026-10-23
Throughput	136 tok/s	2026-10-23	2026-10-23

Regional or per-endpoint measurements appear only when the API supplies them; none are modelled here.

Endpoint and price matrix

Every published price component, including cache reads and writes.

Price components
Component	USD	Evidence
Input / 1M tokens	$2.00
Output / 1M tokens	$10.00
Cache read / 1M tokens	$0.10
Cache write / 1M tokens	$2.50
Blended / 1M (75% input / 25% output)	$4.00
Cost per successful task (LiveBench)	Unavailable

Self-hosted listingAnthropic’s current pricing docs list $2 per million input tokens, $10 per million output tokens, $0.10 cache reads, $2.50 five-minute cache writes, and $4 one-hour cache writes. The October 7, 2026 Haiku 5.5 announcement cut Sonnet 5.5 cache reads by 50% from $0.20. Batch API rates are $1 input and $5 output per million tokens; the cached-input batch estimate is half the current cache-read rate. Anthropic states that the 1M context window is included at standard pricing.The rates above are a hosted price matched from another provider, not a first-party list price.

Workload-aware monthly cost example

10 conversations per day × 8 messages × 22 active days, 1200 input and 400 output tokens per message, no cache. This uses the same calculator as the cost simulator, so an unavailable applicable rate makes the example unavailable too.

Modelled monthly cost$11.26

Modelled tokens2.82M

Open the simulatorChange this workload

Benchmark record

73 matched benchmark rows with their published value, unit, and provenance.

Knowledge

Knowledge benchmarks
Benchmark	Value	Tasks	Difficulty	Provenance
HealthBench (raw) HealthBench raw score	69.4	5,000 multi-turn patient conversations	Realistic healthcare conversations	HealthBench: Evaluating Large Language Models Towards Improved Human Health
HealthBench (length-adjusted) HealthBench length-adjusted score	65.4	5,000 multi-turn patient conversations	Realistic healthcare conversations	HealthBench: Evaluating Large Language Models Towards Improved Human Health
HealthBench Professional (raw) HealthBench Professional raw score	77.1	525 physician-authored conversations	Professional clinical tasks	HealthBench Professional: Evaluating Large Language Models on Real Clinician Chats

Lifecycle and limitations log

Lifecycle events the source associates with this model, plus what this profile does not claim.

Claude Sonnet 5.5Release · confirmed · announced Unavailable · effective 2026-09-28Anthropic Claude Sonnet 5.5 announcement

What this profile does not claimValues are reproduced exactly as their sources published them, in the units those sources declared; none are converted, interpolated, or averaged across providers. Any field marked unavailable was attempted and not returned — the attempt timestamp is in each badge. Last attempted fetch for this model’s score: 2026-10-23 13:17 UTC.

Benchmark	Value	Tasks	Difficulty	Provenance
SWE-bench Pro SWE-bench Pro	81.3	1,865 repository problems	Long-horizon professional engineering	SWE-Bench Pro: Can AI Agents Solve Long-Horizon Software Engineering Tasks?
FrontierCode 1.1 Main FrontierCode 1.1 Main	46.2	100 private Main tasks (150 in Extended)	Frontier coding-agent quality	FrontierCode leaderboard
FrontierCode 1.1 Extended FrontierCode 1.1 Extended	59.1	150 private software-engineering tasks	Frontier coding-agent quality	FrontierCode leaderboard
SWE Multilingual SWE Multilingual	90.3	Multilingual software-engineering tasks	Professional software engineering	MiniMax M2.7: Early Echoes of Self-Evolution
SWE Multimodal SWE-bench Multimodal	54.3	Multimodal software engineering tasks	Frontier multimodal coding	SWE-bench Multimodal
ProgramBench ProgramBench: Can Language Models Rebuild Programs From Scratch?	79.7	200 program reconstruction tasks	Full-repository software architecture	ProgramBench: Can Language Models Rebuild Programs From Scratch?
FrontierSWE v2 FrontierSWE v2	61.9	34 ultra-long-horizon engineering and research tasks	Ultra-long-horizon frontier software engineering	FrontierSWE v2
Bug Hunt Bench Bug Hunt Bench	51.3	105 planted bugs across two production TypeScript repositories	Blind production-repository bug finding and repair	Bug Hunt Bench method, caveats, and definitions
AA-SciCode Artificial Analysis SciCode	61.0	Scientific coding subproblems	Scientific programming	Artificial Analysis SciCode Benchmark Leaderboard
DeepSWE DeepSWE	71.0	113 software engineering tasks across 91 repositories and 5 languages	Long-horizon software engineering	DeepSWE benchmark blog

Benchmark	Value	Tasks	Difficulty	Provenance
FrontierMath v2 (Tiers 1-3) FrontierMath v2 Tiers 1-3	88.772	285 private advanced mathematics problems	From olympiad-plus to early research mathematics	FrontierMath v2 benchmark hub
FrontierMath v2 (Tier 4) FrontierMath v2 Tier 4	80.488	41 private extreme-difficulty mathematics problems	Research-level mathematics requiring hours or days of expert work	FrontierMath Tier 4 v2 leaderboard
ArXivMath Aug. 2026 (no tools) ArXivMath August 2026 without tools	86.8	57 recent research-mathematics problems	Research mathematics	Claude Opus 5.5 System Card
ArXivMath Aug. 2026 (tools) ArXivMath August 2026 with tools	95.2	57 recent research-mathematics problems	Research mathematics	Claude Opus 5.5 System Card

Benchmark	Value	Tasks	Difficulty	Provenance
AA-LCR Artificial Analysis Long Context Reasoning	82.7	Long-context reasoning tasks	Long-context reasoning	Artificial Analysis model benchmarks
MLCR-AA Medical Long Context Reasoning (MLCR-AA)	75.0	Long, fragmented medical-record reasoning	Long-context medical reasoning	Medical Long Context Reasoning (MLCR-AA)
CritPt Critical Physics Tasks	31.4	Research-level physics questions	Research-level physics reasoning	CritPt Benchmark Leaderboard

Benchmark	Value	Tasks	Difficulty	Provenance
GMMLU Global MMLU	92.1	Knowledge questions across 42 languages	Multilingual knowledge	Global MMLU: Understanding and addressing cultural and linguistic biases in multilingual evaluation
MILU Multi-task Indic Language Understanding Benchmark	91.6	Knowledge tasks across 11 languages	Multilingual Indic knowledge	MILU: A Multi-task Indic language understanding benchmark

Benchmark	Value	Tasks	Difficulty	Provenance
DRACO Data Research and Analysis with Complex Operations	87.0	Agentic data research and analysis tasks	Professional data analysis	Claude Opus 5 System Card
LAB all-pass (Harvey held-out) Legal Agent Benchmark all-pass rate — Harvey held-out set	10.0	Harvey-held-out legal-agent tasks	Professional legal work	Claude Opus 5 System Card
LAB criterion-pass (Harvey held-out) Legal Agent Benchmark mean criterion-pass rate — Harvey held-out set	93.1	Harvey-held-out legal-agent tasks	Professional legal work	Claude Opus 5 System Card
Toolathlon Verified Pass@3 Toolathlon Verified Pass@3	85.2	108 verified real-world tool-use tasks	Long-horizon application tool use	Claude Opus 5 System Card
Toolathlon Verified Pass³ Toolathlon Verified Pass cubed	68.5	108 verified real-world tool-use tasks	Long-horizon application tool use	Claude Opus 5 System Card
Toolathlon Verified avg. turns Toolathlon Verified average assistant turns	31.6	108 verified real-world tool-use tasks	Long-horizon application tool use	Claude Opus 5 System Card
Terminal-Bench 4.0 Terminal-Bench 4.0	70.60	66 professional computer-work tasks	Frontier autonomous knowledge work	Terminal-Bench 4.0
Terminal-Bench-Science 0.1 Terminal-Bench-Science 0.1	59.9	70 expert-curated scientific research workflows	Frontier scientific research workflows	Terminal-Bench-Science 0.1
AA Briefcase Artificial Analysis Briefcase	1811	Professional knowledge-work tasks	Professional work	Artificial Analysis Briefcase Benchmark Leaderboard
AA AutomationBench Artificial Analysis AutomationBench	71.8	Business-process automation tasks	Agentic automation	Artificial Analysis AutomationBench Benchmark Leaderboard
AA Harvey LAB v1.0 Artificial Analysis Harvey LAB-AA v1.0	93.1	Legal agent tasks	Professional legal work	Artificial Analysis Harvey LAB-AA Benchmark Leaderboard
HLE w/ tools Humanity's Last Exam with tools	64.5	Expert questions with tool use	Frontier tool-augmented reasoning	DeepSeek-V4 Technical Report
GDPval-AA GDPval-AA	1844	Agentic real-world work tasks	Professional agentic workflows	DeepSeek-V4 Technical Report
GDPval-AA GDPval-AA normalized	66.9	Economically valuable tasks	Professional agentic workflows	Artificial Analysis model benchmarks
AA Terminal-Bench 4.0 Artificial Analysis Terminal-Bench v4.0	63.6	Terminal-based agent tasks	Agentic software engineering	Artificial Analysis Terminal-Bench v4.0 Benchmark Leaderboard
GDP.pdf Artificial Analysis GDP.pdf	25.8	Professional document-production tasks	Professional knowledge work	GDP.pdf Benchmark Leaderboard
AA-AnalystAgent Artificial Analysis AnalystAgent	57.5	Spreadsheet and document analysis questions	Business and data analysis	AA-AnalystAgent Benchmark Leaderboard
Toolathlon-Verified Toolathlon-Verified	77.8	Verified multi-tool workflows	Advanced tool use	Kimi K3: Open Frontier Intelligence
AutomationBench (Zapier 1.0.6) AutomationBench, Zapier private evaluation set release 1.0.6	44.70	600+ held-out workflows across 47 simulated applications and six business domains	Long-horizon automation	AutomationBench
Hermes Index Hermes Index: agentic capability and cost per task inside Hermes Agent	53.1	Four suites: Hermes Bench (150 tasks), TerminalBench 4 without its 4 GPU tasks, TerminalBench Science and SkillsBench	Frontier agentic	Hermes Index: an agentic model leaderboard
Hermes Bench Hermes Bench: 150 agent tasks graded on the files and state the agent leaves behind	73.5	150 tasks across 25 categories	Frontier agentic	Hermes Bench (Hermes Index)
MazeBench MazeBench: visual spatial reasoning in a 3D open world	8	100 hidden gems across 256 rooms in one open world	Long-horizon spatial planning, with single puzzles that can take over one hundred moves	MazeBench Results

Explore models

Top 1-5

Top 6-10

Featured

Capabilities

Benchmarks

Compare

Featured model comparisons

Featured provider comparisons

Articles